Angular Superresolution for a Scanning Antenna with Simulated Complex Scatterer-Type Targets
Abstract
The Scan-MUSIC (MUltiple Signal Classification), or SMUSIC, algorithm was developed by the Millimeter Wave Branch, Sensors and Electron Devices Directorate, Army Research Laboratory (ARL). The algorithm improves angular resolution for target detection with the use of a single rotatable sensor scanning in an angular region of interest. This algorithm has been adapted and extended from the MUSIC algorithm that has been used for a linear sensor array. Experimental and computer simulation results have resolved two closely spaced point targets that exhibited constructive interference, but not for the targets that exhibited destructive interference. The interferences occurred due to the relative phases of their returned signals. Therefore, there were some limitations of the algorithm for the point targets. In this paper, I extend the application of the SMUSIC algorithm to a problem of complex scatterer-type targets, which is more useful and of greater practical interest. The SMUSIC simulation results show that the algorithm can resolve centroids of the complex scatterer-type targets in which they are close together within the beamwidth of a Ka radar antenna with frequency diversification. To make it easier to see the results of the simulation and to demonstrate the SMUSIC algorithm for the complex scatterer-type targets, I developed a graphical interface tool to run and analyze the SMUSIC algorithm. The tool, which is written in the MATLAB language, allows an end user to analyze the performance of the SMUSIC algorithm by entering a combination of parameters necessary for the simulation.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2002
- Accession Number
- ADA404823
Entities
People
- Canh Ly
Organizations
- United States Army Research Laboratory